/**
 * @file os_time.c
 * @author XRADIO IOT WLAN Team
 */

/*
 * Copyright (C) 2017 XRADIO TECHNOLOGY CO., LTD. All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *    1. Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the
 *       distribution.
 *    3. Neither the name of XRADIO TECHNOLOGY CO., LTD. nor the names of
 *       its contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "kernel/os/os_time.h"
#include "os_util.h"
#include "task.h"

/* system clock's frequency, OS ticks per second */
uint32_t OS_TickRateHz = configTICK_RATE_HZ;

OS_Time_t OS_GetTicks(void)
{
	return (OS_Time_t)xTaskGetTickCount();
}

OS_Time_t OS_GetTime(void)
{
	return (OS_Time_t)(xTaskGetTickCount() / OS_HZ);
}

void OS_MSleep(OS_Time_t msec)
{
	vTaskDelay((TickType_t)OS_MSecsToTicks(msec));
}

/* The fake random 32-bit value is generated by combining OS ticks and
 * the value of SysTick current value register.
 */
uint32_t OS_Rand32(void)
{
	return (uint32_t)(((*((volatile uint32_t *)0xE000E018)) & 0xffffff) |
	                  (OS_GetTicks() << 24));
}
